My Inquiry
My Account
Diodes Incorporated ZTX751STOB
,TO-226_straightlead.jpg)
- Part No.:
- ZTX751STOB
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Bipolar Transistors
- Package:
- E-Line-3, Formed Leads
- Datasheet:
-
ZTX751STOB.pdf
- Description:
- TRANS PNP 60V 2A E-LINE
- Quantity:
- Payment:
- Shipping:
Inventory:7,907
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
ZTX751STOB from Diodes Incorporated is a PNP silicon planar medium-power bipolar junction transistor (BJT) designed for linear amplification and switching in industrial power control stages. It features -60 V VCEO, -2 A continuous collector current, 1 W power dissipation at 25°C, 140 MHz transition frequency, and low saturation voltage down to -0.15 V at IC = -1 A / IB = -100 mA - used in DC-DC converter output stage drivers.
For engineers reviewing the ZTX751STOB datasheet, ZTX751STOB pinout, ZTX751STOB application, or ZTX751STOB equivalent, key selection criteria include verified PNP polarity, TO-92-compatible E-Line package thermal resistance (Rth(j-amb) = 175°C/W on PCB), safe operating area limits, and guaranteed V(BR)CEO ≥ -60 V under IC = -10 mA.
Technical Context
This BJT operates with fixed-current gain (hFE) ranging from 75 to 225 at IC = -1 A and VCE = -2 V, supporting stable biasing in Class-A amplifier and saturated-switch configurations. Its fT of 140 MHz enables reliable operation up to audio and low-RF switching frequencies.
Thermal design relies on validated junction-to-ambient resistance (175°C/W on 1 in² copper PCB) and derating curve showing linear power reduction above 25°C - critical for sustained -2 A conduction in enclosed industrial enclosures.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCEO | -60 V - maximum allowable collector-emitter voltage before breakdown under open-base condition |
| IC (cont.) | -2 A - continuous DC collector current rating at Tamb = 25°C with proper heatsinking |
| Ptot | 1 W - total power dissipation limit at 25°C ambient, derated 5.7 mW/°C above 25°C |
| fT | 140 MHz - transition frequency confirming usable bandwidth for audio and switching applications |
| VCE(sat) | -0.15 V (typ.) at IC = -1 A / IB = -100 mA - ensures <0.15 W conduction loss per device in saturated switch mode |
| Rth(j-amb) | 175 °C/W - junction-to-ambient thermal resistance on standard 1 in² PCB copper area |
Pinout & Package
Package: TO-92-compatible E-Line plastic package with emitter (E), base (B), and collector (C) leads arranged in straight-line configuration. Leads are tinned and solderable per J-STD-020.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| E (Emitter) | Current source terminal for PNP device | Connected to higher potential rail; carries full load current in common-emitter switch |
| B (Base) | Control input for minority-carrier injection | Requires negative drive current relative to emitter to turn on; typical IB = -100 mA for full saturation at IC = -1 A |
| C (Collector) | Current sink terminal | Connected to load and ground return path; must withstand -60 V reverse bias during inductive flyback |
Key Features
| Feature | Design Value |
|---|---|
| Low VCE(sat) | -0.15 V typ. at IC = -1 A reduces conduction losses by >40% vs. legacy PNP transistors with >0.3 V saturation |
| High fT | 140 MHz supports clean square-wave switching up to ~10 MHz with minimal rise/fall time degradation |
| Robust SOA | Rated for 10 ms pulses at 10 A / -40 V - enables reliable handling of inductive kickback in relay drivers |
| Wide Tj range | -55°C to +200°C junction temperature allows deployment in automotive engine-bay and industrial motor-control environments |
Applications
| Industrial Relay Drivers | Linear Voltage Regulator Pass Transistors |
|---|---|
Use Scenario: Driving 24 V DC industrial relays with 500 mA coil current in PLC output modules. IC Role / Device Role / Timing Role: PNP switch controlling relay coil ground path; turned on/off via microcontroller GPIO through base resistor. Use Value: -0.15 V VCE(sat) limits relay-coil power loss to <75 mW, preventing thermal drift in high-density I/O racks. | Use Scenario: Pass element in adjustable 3-terminal linear regulator delivering 1.5 A at 5 V from 12 V input. IC Role / Device Role / Timing Role: Series pass transistor dissipating excess voltage as heat; biased in active region for regulation. Use Value: 1 W Ptot and 175°C/W Rth(j-amb) support 7 V dropout at 1.5 A with ≤55°C junction rise on standard PCB. |
| DC-DC Converter Output Stages | Audio Power Amplifier Drivers |
Use Scenario: Synchronous rectifier driver in non-isolated buck converter for 5 V/2 A embedded power rail. IC Role / Device Role / Timing Role: Low-side PNP switch complementing N-channel MOSFET; driven with inverted logic signal. Use Value: 140 MHz fT and 40 ns ton ensure precise timing alignment with main switch, minimizing shoot-through risk. | Use Scenario: Driver stage for ±12 V Class-AB audio amplifier output section. IC Role / Device Role / Timing Role: Voltage-controlled current source providing base drive to output BJTs; operated in linear region. Use Value: hFE = 125–225 across 0.01–1 A ensures stable small-signal gain and low THD below 20 kHz. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar PNP medium-power transistor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MJD2955G | TO-220 package, higher Ptot = 115 W, VCEO = -60 V, IC = -10 A | Requires heatsink; suited for >3 A loads where PCB space permits | Select when thermal budget exceeds TO-92 capability and forced-air cooling is available |
| BC557B | TO-92, lower IC = -100 mA, VCEO = -45 V, Ptot = 500 mW | Limited to signal-level or low-current switching; not suitable for >500 mA loads | Choose only for bias networks or low-power logic inversion where ZTX751STOB's current headroom is unnecessary |
Compared with MJD2955G and BC557B, ZTX751STOB uniquely balances TO-92 mountability, -2 A current capacity, and 1 W dissipation - making it optimal for space-constrained industrial controls needing robust medium-power PNP switching without external heatsinks.
Availability
ZTX751STOB is available at Aetrix Electronics and suitable for industrial relay drivers, linear voltage regulator pass elements, DC-DC converter output stages, and audio amplifier driver circuits requiring stable component supply and long-term manufacturability.
Supply support for ZTX751STOB includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global leader in discrete semiconductors and analog ICs, serving industrial, computing, consumer, and communications markets with high-reliability components.
ZTX751STOB belongs to the ZTX series of medium-power bipolar transistors engineered for ruggedized industrial switching and linear regulation - emphasizing thermal stability, repeatable gain, and consistent saturation performance across temperature.
FAQ
What is the maximum safe collector-emitter voltage for ZTX751STOB in continuous operation?
The absolute maximum VCEO is -60 V at IC = -10 mA with open base. For reliable long-term operation, design margin recommends limiting steady-state VCE to ≤ -45 V. Transient spikes up to -60 V are acceptable if duration remains under 100 µs and duty cycle ≤ 2%, per pulsed ratings.
Can ZTX751STOB be used in parallel for higher current handling?
No - ZTX751STOB lacks built-in emitter ballasting resistors and exhibits positive thermal coefficient of VBE, leading to current hogging when paralleled. For >2 A applications, use a single higher-rated device like MJD2955G or implement active current-sharing circuitry.
What is the recommended base resistor value for switching a 1 A load at 5 V logic drive?
With VBE(sat) ≈ -0.9 V and required IB = -100 mA (for IC/IB = 10), a 5 V logic source needs RB = (5 V − 0.9 V) / 0.1 A = 41 Ω. Use 39 Ω ±5% standard value; verify actual IB with oscilloscope to confirm saturation under load.
Does ZTX751STOB meet RoHS and REACH compliance requirements?
Yes - ZTX751STOB is manufactured per Diodes Incorporated's standard RoHS-compliant process (Pb-free, halogen-free) and conforms to EU REACH SVHC thresholds. Full compliance documentation, including material declarations and test reports, is available upon request from Aetrix Electronics' technical support team.
ZTX751STOB Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- E-Line-3, Formed Leads
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Transistor Type:
- PNP
- Current - Collector (Ic) (Max):
- 2 A
- Voltage - Collector Emitter Breakdown (Max):
- 60 V
- Vce Saturation (Max) @ Ib, Ic:
- 500mV @ 200mA, 2A
- Current - Collector Cutoff (Max):
- 100nA (ICBO)
- DC Current Gain (hFE) (Min) @ Ic, Vce:
- -
- Power - Max:
- 1 W
- Frequency - Transition:
- 140MHz
- Operating Temperature:
- -55°C ~ 200°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- E-Line (TO-92 compatible)
ZTX751STOB FAQ
1.How can I place an order for ZTX751STOB through Aetrix?
Please submit a Request for Quotation (RFQ) for ZTX751STOB on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for ZTX751STOB reliable?
The price and inventory of ZTX751STOB are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for ZTX751STOB is usually 5 days.
3.What payment methods are accepted for ZTX751STOB?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for ZTX751STOB transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for ZTX751STOB?
ZTX751STOB orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your ZTX751STOB order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for ZTX751STOB?
For technical support, including ZTX751STOB datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your ZTX751STOB requirements.
6.How does Aetrix verify that ZTX751STOB is sourced from the original manufacturer or authorized distributors?
All ZTX751STOB products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that ZTX751STOB meets industry standards.
7.What is the process for return or replacement of ZTX751STOB?
All ZTX751STOB units undergo pre-shipment inspection (PSI). If there is an issue with ZTX751STOB, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The ZTX751STOB part is unused and in its original packaging.
Return procedure for ZTX751STOB:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
ZTX751STOB Tags
-
MMBT3906LT1G
onsemi
-
MMBT3904-7-F
Diodes Incorporated
-
MMBT3904LT1G
onsemi
-
MMBT3906-7-F
Diodes Incorporated
-
MMBT3904-TP
Micro Commercial Co
-
MMBT2222A-7-F
Diodes Incorporated
-
BC846BLT1G
onsemi
-
BC847B,215
Nexperia USA Inc.
-
SMMBT3904LT1G
onsemi
-
MMBT2222A-TP
Micro Commercial Co
-
MMBTA06LT1G
onsemi
-
MMBT2222ALT1G
onsemi
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
